大约有 31,100 项符合查询结果(耗时:0.0488秒) [XML]

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Why does make think the target is up to date?

This is my Makefile: 4 Answers 4 ...
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Can you add new statements to Python's syntax?

...ty good guideline. Note that I've decided to exclude the else clause from my definition of until, just to make it a little bit different (and because frankly I dislike the else clause of loops and don't think it fits well with the Zen of Python). The second change is to modify the rule for compoun...
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What's a good way to extend Error in JavaScript?

I want to throw some things in my JS code and I want them to be instanceof Error, but I also want to have them be something else. ...
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HTML - how can I show tooltip ONLY when ellipsis is activated

I have got a span with dynamic data in my page, with ellipsis style. 14 Answers 14 ...
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Change R default library path using .libPaths in Rprofile.site fails to work

... I generally try to keep all of my packages in one library, but if you want to add a library why not append the new library (which must already exist in your filesystem) to the existing library path? .libPaths( c( .libPaths(), "~/userLibrary") ) Or (and ...
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Equation for testing if a point is inside a circle

...times by time ./a.out I implemented this method, a normal method and a dummy method to determine timing overhead. Normal: 21.3s This: 19.1s Overhead: 16.5s So, it seems this method is more efficient in this implementation. // compile gcc -O3 <filename>.c // run: time ./a.out #include <...
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Swift native base class or NSObject

...ectly spots the error in testIncorrect_CompilerShouldSpot, reporting "... 'MyClass' is not convertible to 'MirrorDisposition'" class MyClass { let mString = "Test" func getAsString() -> String { return mString } func testIncorrect_CompilerShouldSpot() { var myString = "Compare ...
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How do I cast a string to integer and have 0 in case of error in the cast with PostgreSQL?

... I was just wrestling with a similar problem myself, but didn't want the overhead of a function. I came up with the following query: SELECT myfield::integer FROM mytable WHERE myfield ~ E'^\\d+$'; Postgres shortcuts its conditionals, so you shouldn't get any non-inte...
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git rebase fatal: Needed a single revision

I have a branch of a public repository and I am trying to update my branch with the current commits from the original repository: ...
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Is there a “goto” statement in bash?

... "My quest to make bash look like assembly language draws ever nearer to completion." - Wow. Just, wow. – Brian Agnew Mar 8 '16 at 16:00 ...